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yes, happened to me in my 01 R/T. the dash and headlights would flash if any kind of CEL or other light (low gas/ door ajar/ etc) would come on. i replace the BCM (body control module), all is well.
It could be the Central Timer Modulehas a problem. What year is the truck and how many miles on it? Does it keep happening even when the ignition is on and the truck is running? Are there any codes stored from the PCM? And does it have an alarm installed, whether factory or aftermarket?